<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script src="https://cdn.jsdelivr.net/npm/vue@2.5.16/dist/vue.js"></script>
    <script src="https://unpkg.com/axios/dist/axios.min.js"></script>
</head>
<body>
<div id="app">
    <p>{{currentTime1}}</p>

</div>
</body>
<script>
    var vm = new Vue({
        el: "#app",
        computed: {
            currentTime1:function () {
                return Date.now();
            }
        }
    })
</script>
</html>